The exact cause of breast cancer has not been determined. Because the etiology of breast cancer may be related to a variety of factors, therefore, can only say that the incidence of breast cancer may be related to the following factors:
(1) genetic susceptibility: family history of the survey data indicates that there is a family history of breast cancer incidence than those without a family history should be high. Especially in patients with bilateral breast cancer and age of onset less, these women in the risk of breast cancer for women in general of the nine times, and genetic factors may be related to breast cancer susceptibility of the physical and internal lesions.
(2) endocrine factors: endocrine disorders is one of the causes of breast cancer. Because of long-term breast-endocrine abnormalities stimulation, resulting in cancerous breast tissue, estrogen and progesterone is the most malignant breast closely with the two-endocrine. This has been many clinical, pathological and confirmed by the physiologist.
(3) virus: the virus particles can be transmitted through breast-feeding, resulting in breast cancer, this has been through more animal experiments confirmed, so some scholars speculate the cause of breast cancer may be a virus, but it does not have sufficient epidemiological evidence, to be further studied.
(4) other factors: the body immunocompromised cancer, cancer of the immune function by the inhibition and stimulation breast trauma, radiation damage, and so on, are prone to breast cancer coverage.
(1) genetic susceptibility: family history of the survey data indicates that there is a family history of breast cancer incidence than those without a family history should be high. Especially in patients with bilateral breast cancer and age of onset less, these women in the risk of breast cancer for women in general of the nine times, and genetic factors may be related to breast cancer susceptibility of the physical and internal lesions.
(2) endocrine factors: endocrine disorders is one of the causes of breast cancer. Because of long-term breast-endocrine abnormalities stimulation, resulting in cancerous breast tissue, estrogen and progesterone is the most malignant breast closely with the two-endocrine. This has been many clinical, pathological and confirmed by the physiologist.
(3) virus: the virus particles can be transmitted through breast-feeding, resulting in breast cancer, this has been through more animal experiments confirmed, so some scholars speculate the cause of breast cancer may be a virus, but it does not have sufficient epidemiological evidence, to be further studied.
(4) other factors: the body immunocompromised cancer, cancer of the immune function by the inhibition and stimulation breast trauma, radiation damage, and so on, are prone to breast cancer coverage.
